A trade magazine routinely checks the drive-through service times of fast food restaurants. A 90% confidence interval that results from examining 750 customers in one fast food chain's drive through has a lower bound of 177.0 seconds and an upper bound of 180.6 seconds. What does this mean?

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.